43194555889 has 3 divisors (see below), whose sum is σ = 43194763723. Its totient is φ = 43194348056.

The previous prime is 43194555883. The next prime is 43194555953. The reversal of 43194555889 is 98855549134.

The square root of 43194555889 is 207833.

It is a perfect power (a square), and thus also a powerful number.

43194555889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 25133346225 + 18061209664 = 158535^2 + 134392^2 .

It is not a de Polignac number, because 43194555889 - 2³ = 43194555881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43194555881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 103917 + ... + 311749.

Almost surely, 2^43194555889 is an apocalyptic number.

43194555889 is the 207833-rd square number.

43194555889 is the 103917-th centered octagonal number.

It is an amenable number.

43194555889 is a deficient number, since it is larger than the sum of its proper divisors (207834).

43194555889 is an frugal number, since it uses more digits than its factorization.

43194555889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415666 (or 207833 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 61.

The spelling of 43194555889 in words is "forty-three billion, one hundred ninety-four million, five hundred fifty-five thousand, eight hundred eighty-nine".